Franking machine



March 11, 1930. w. FRlEDRlCHS FRANKING MACHINE Filed Dec. 22, 1928 Fig.1

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Patented Mar. 11, 1930 UNITED STATES? WILHELM FRIEDRIGI'IS,

FRANKING I MACHINE or 31 m. mm.

Original application filed August 8, 1922, Serial No."580;450. Divided and this application .flled December 22, 1928. Serial No.'327,907.

The present application is a division of my copending application Serial No. 580,450,

filed August 8th, 1922.

In the accompanying drawing which illustrates a preferred form of the invention- Fig. 1 is a plan view of the device,

Fig. 2 an end view of the same.

In this form of construction a printing device B, in the form of a hollow drum, is keyed upon a hollow driving shaft A. In the drum Bis revolubly mounted a shaft G having fixed upon it a type carrier W, in the form of a wheel, having types of various values on its periphery. Within the hollow shaft A is.

loosely mounted a shaft C, having fixed to its outer end a toothed wheel D. WVithin the from a setting device described below.

wheel I. The latter receives a driving motion from the crank or motor by which the machine is driven, through the intermediary of an automatically controlled coupling. The driving wheel I is fixed upon a shaft K, to which is also secured a locking disk T having a notch T in which engages a pawl U controlled by a rod V. The rod V is controlled by a feeler (not shown) operated by the insert-ion of a letter. The operation of the feeler causes the motor to be coupled to drive the gear I and the pawl U to be raised from the notch T, to release the locking disk T.

Upon the shaft K are loosely mounted a rigidly connected pair of toothed wheels N, Q, and a second rigidly connected pair of toothed wheels 0, 0. Wheel 0 is in mesh with the toothed wheel D, while the wheel Q drum B there is fixed upon the shaft C a pin'- ion E, which is in mesh with a pinion F fixed to shaft G. This'mechanism serves for transmitting adjustments to the type carrier j thetoothedwheel Dand consequently by the On the hollow shaft A is secured a toothed a wheel H, which is in mesh with a driving is in'mesh with asettingwheel rigidly corn V nected with. a setting disk R. ThediskvR has notches around its periphery, with which a spring pressed pawl Kris adapted to on gage, to lock the settingdisk and wheel; -Be-v tween the toothed-wheels N1 and 0,.them is fixed to the shaft K an arm L, bearing'at its end two rigidly connected, rotatably mounted toothed wheels M, M-". The planet-wheel M is connected by an intermediate wheel P =-withthe sun wheel N, while theiwheel M I meshes directly With-thewheel O. The'ratio of transmission from, wheel S; to wheelQ is 2: 1; the ratio of transmission from 0'-m D is 1:2; the ratio 'of transmission-of all the other intermediate wheels is 11.1.1. The oper ation of the device is as TOIIOWS'Pw- Assuming that the driving shaft. A' is at rest' and that, the type-wheel W has. to e adjusted,lpawl X is, lifted out; ofithe notch ofthe adjusting idiskR whichcan beinow adjusted to the desiredfigura' Themovement of 'thefadjusting disk/R is transmitted .by toothed Wheel S'totoothed Wheel Qin the movement of which the sun wheelgN participates. This. movement is" further transmit tedby the intermediate wheel P, planet wheels .M, M and toothed wheels 0, Q; to

toothed wheels E and Flto the typewheel- W. In view of the ratio oftransmission stated above, the type wheel W will be turned through the same angle as; the adjusting Now, if the disk T is unlocked, when the printing device B is revolved by the motor, through the intermediary of toothed wheels, I, H and shaft A the planet wheels M, M will revolve around axle K with the same speed at which wheel I revolves, as the arm -L which carries these planet wheels is rigidly connected with said axle K. As the adjusting disk R is locked by pawl X the sun wheel M which is connected with the adjusting disk through the intermediary of the wheels Q and S will remain stationary during this movement. Owing to the rotation of the planet gear, wheels 0, O are driven from the planet gear at an angular speed which is twice as great as the. angular speed of the toothed wheel I. As, however, the ratio of transmission between 0 and D is=lz2 the toothed wheel D will be driven at the same angular speed as toothed wheels I, and H, which are of equal size, the movement of toothed wheel D being exactly the same as if this toothed wheel were keyed upon the driving shaft A. Consequently any displacement of the type wheel W is excluded.

Having described my invention, I claim:

1. In a printing device, a rotatable drum, a type carrier adjustably mounted in said drum, a gear for rotating said drum, a gear for adjusting said type carrier in said drum, a setting mechanism, means for locking said setting mechanism, and a planet gear connecting said drum rotating gear and said setting mechanism to said type carrier adjusting gear, the arrangement being such that said type carrier is freely adjustable by said setting mechanism, while the turning of said drum rotating gear causes the simultaneous rotation of said type carrier adjusting gear to maintain said type carrier in a fixed relation to said drum.

2. In a printing device, a rotatable drum, a type carrier adjustably mounted in said drum, a gear for rotating said drum, a gear for adjusting said type carried in said drum, a setting mechanism, means for locking said setting mechanism, a planet gear consisting of a sun wheel member, an arm member, and a planet wheel member rotatably mounted upon said arm member and geared to said sun wheel member, a connection between said setting mechanism and one of said members, a connection between said drum rotating gear and another of said members, and a connection between said type carrier adjusting gear and the third of said members, the arrangement being such that said type carrier is freely adjustable by said setting mechanism, while the turning of said drum rotating gear causes the simultaneous rotation of said type carrier adjusting gear to maintain said type carrier in a fixed relation to said drum.

In testimony whereof I afiix my signature.

WILHELM FRIEDRICHS. 

